Denchi declined to comment but their website say they are “proud to be a leading supplier of batteries and chargers to global defence industry”.

The Campaign Against Arms Trade say ABSL are listed as sub-contractors to provide “emergency battery back-up” for a British drone called Watchkeeper WK450.

The Watchkeeper contract was awarded to UAV Tactical Systems Ltd, a joint venture between Israeli arms company Elbit Systems and a second arms firm called Thales UK.

Another arms firm with links to Israel is Selex ES which sponsored the Commonwealth Games and Edinburgh Science Festival.

Selex, owned by Italian industrial group Finnmeccanica, received £14 million from the Scottish government and Scottish Enterprise in the past 10 years for research in Scotland. They employ 2000 staff in Edinburgh.